Q: Is 691,553 a Prime Number?
A: Yes, 691,553 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 691553 can be evenly divided by 1 and 691,553, with no remainder.
Since 691,553 can be divided by just 1 and 691,553, it is a prime number.